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单选题（）is not a physical wall, but a lot of virtual data to protect the computer network.A Data wall B Data Channel C Data base D firewall

题目
单选题
（）is not a physical wall, but a lot of virtual data to protect the computer network.
A

Data wall  

B

Data Channel  

C

Data base  

D

firewall

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相似问题和答案

第1题：

（ ）is a paradigm for enabling network access to a scalable and elastic pool of shareable physical or virtual resources with self-service provisioning and administration on-demand.

A. VPN
B.Big datA.
C.ClouD.computing
D. Cyber-physical System

答案：C
解析：
翻译：云计算使网络能够连接到一个可共享可扩展的资源池，按需提供物理或者虚拟的资源。A．虚拟专用网络 B．大数据 C．云计算 D．物理信息系统

第2题：

（　）is a computer technology that headsets ，sometimes in combination With physical spaces or multi—projected environments，to generate realistic images ，sounds and other sensations that simulate a user's physical presence in a virtual or imaginary environment.

A.virtual reality
B.ClouD.computing
C.Big data
D.Internet+

答案：A
解析：
参考译文虚拟现实是一种计算机技术，使用头戴式视图器与物理空间或多投影环境结合，产生现实的图像、声音和其他感觉，模拟用户在一个虚拟的或想象的环境中的真实存在。A. 虚拟现实 B. 云计算C. 大数据 D.互联网+

第3题：

The X.25 standard specifies three layers of functionality.Which layers of the OSI model correspond to the X.25 layers?

A．the Physical, Network, and Session Layers

B．the Physical, Data Link, and Network Layers

C．the Physical, Data Link, and Transport Layers

D．the Physical, Session, and Presentation layers


正确答案：B

第4题：

（）is not a physical wall, but a lot of virtual data to protect the computer network.

  • A、Data wall  
  • B、Data Channel  
  • C、Data base  
  • D、firewall

正确答案:D

第5题：

What are three physical interface properties?（）

  • A、payload scrambling
  • B、virtual circuit identifier
  • C、FCS
  • D、link speed
  • E、IP address

正确答案:A,C,D

第6题：

Together with the network layer,the transport layer is the heart of the protocol ( ).The network layer provides end-to-end () delivery using datagrams or virtual circuits.The transport layer builds on the network layer to provide data transport from a process on a () machine to a process on a destination machine with a desired level of reliability that is independent of the physical () currently in use.It provides the abstractions that applications nedd to use the network..Without the (请作答此空) layer,the whole concept of layered protocols would make little sense.

A.network
B.transport
C.link
D.physical

答案：B
解析：

第7题：

What is a physical data model？Why learn physical data model concepts？


正确答案: 1）、执行逻辑数据模型的理论基础，使用现有的构件在一个有效容错的方式中
2）、选择合适的 DBMS ，某些 DBMS 不支持空间索引；使 DBMS 运行的更加有效率。

第8题：

（）is a computer technology that headsets,sometimes in combination with physical spaces or multi-projected environments,to generate realisitic images,sounds and other sensations that simulate a user’s physical presence in a virtual or imaginary environment.

A.Virtual Reality

B.Cloud computing

C.Big data

D.Internet+


正确答案：A

第9题：

（）is not a physical wall but a flow virtual data to protect the computer network.

  • A、data wall 
  • B、data channel 
  • C、database 
  • D、firewall

正确答案:D

第10题：

（） is not a physical wall, but a lot of virtual data to protect the computer network.

  • A、Date wall   
  • B、Date channel   
  • C、Database   
  • D、Firewall

正确答案:D

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